三相非隔离型Heric光伏逆变器漏电流抑制研究

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Abstract In recent years,the transformerless photovoltaic inverter has attracted more and more attentions in academic and industry for its light weight,small size,and high efficiency.But its leakage current is one of the most important issues.A new three-phase HERIC topology is proposed based on the single-phase one in this paper to solve the problem.The operation principle and the common mode model is presented.The effect of the modulation strategies on the common mode voltage (CMV) is discussed.A new modulation scheme based on Boolean logic operation is proposed to solve the problems of common mode voltage fluctuation.Consequently,the leakage current is significantly reduced.The simulation of the proposed solution is carried out in Matlab,and the experimental tests are implemented on a down-scaled hardware prototype.The results verify the effectiveness of the proposed solution.

Key words： Transformerless PV inverter three-phase Heric topology common mode voltage leakage current

Received: 29 May 2015 Published: 18 September 2016

PACS:

TM46

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	Articles by authors
	Zhang Chunjiang
	Ben Bing
	Li Jian
	GuoXiaoqiang

Cite this article:

Zhang Chunjiang,Ben Bing,Li Jian等. Leakage Current Suppression for Three-Phase Transformerless Heric Photovoltaic Inverter[J]. Transactions of China Electrotechnical Society, 2016, 31(17): 113-120.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I17/113

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